:root {
  --primary: #0050ff;
  --primary-soft: #eef3ff;
  --text: #0f172a;
  --sub: #64748b;
  --border: #e2e8f0;
  --surface: #ffffff;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--text);
  background: #f9fafb;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.75;
}

a { color: var(--primary); }

a:hover { text-decoration-thickness: 2px; }

.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.nav-inner {
  width: min(100% - 32px, 760px);
  min-height: 54px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-brand {
  color: #000;
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links { display: flex; gap: 4px; }

.nav-links a {
  padding: 7px 10px;
  border-radius: 8px;
  color: #475569;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--primary);
  background: var(--primary-soft);
}

main {
  width: min(100% - 32px, 760px);
  margin: 42px auto 64px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
}

h1, h2, h3 { line-height: 1.35; }

h1 {
  margin: 0 0 12px;
  color: #000;
  font-size: clamp(30px, 6vw, 42px);
}

h2 {
  margin: 36px 0 10px;
  font-size: 22px;
}

h3 {
  margin: 24px 0 8px;
  font-size: 18px;
}

p, ul, ol { margin: 0 0 16px; }

li + li { margin-top: 8px; }

.lead {
  max-width: 680px;
  margin-bottom: 24px;
  color: #475569;
  font-size: 18px;
}

.updated {
  display: inline-block;
  margin-bottom: 24px;
  padding: 5px 10px;
  border-radius: 999px;
  color: #475569;
  background: #f1f5f9;
  font-size: 13px;
}

.card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.04);
}

.card h2:first-child,
.card h3:first-child { margin-top: 0; }

.note {
  margin: 24px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--primary);
  border-radius: 0 12px 12px 0;
  background: var(--primary-soft);
}

.page-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.page-links a {
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  background: #fff;
  font-weight: 650;
  text-decoration: none;
}

.page-links a:hover { border-color: #9db8ff; }

.contact-link {
  display: inline-flex;
  margin-top: 8px;
  padding: 11px 16px;
  border-radius: 10px;
  color: #fff;
  background: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

footer {
  padding: 28px 16px 36px;
  border-top: 1px solid var(--border);
  color: var(--sub);
  background: #fff;
  text-align: center;
  font-size: 14px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 18px;
  margin-bottom: 10px;
}

.footer-links a { color: #475569; text-decoration: none; }
.footer-links a:hover { color: var(--primary); text-decoration: underline; }

@media (max-width: 520px) {
  .nav-inner { width: min(100% - 20px, 760px); }
  .nav-links a:first-child { display: none; }
  main { width: min(100% - 24px, 760px); margin-top: 28px; }
  .card { padding: 20px; }
}